My tech books have a warning that prohibits the use of water on hot brakes, due to the risk of explosion. The only meathod we are allowed to use for cooling hot brakes is forced air. What was the operator, that may explain a lot.

It is interesting that you say your a/c are being disinfected with a Chlorine/water mix because Boeing & Airbus have told us not to allow such a solution to be used as it causes corrosion & hydrogen embrittlement if it gets onto the brakes/wheel hubs & landing gear structure